tsconfig.json

{
  "compilerOptions": {
    "baseUrl": "src",
    "outDir": "./dist",
    "module": "commonjs",
    "target": "es5",
    "lib": [
      "es6",
      "dom"
    ],
    "removeComments":true,
    "pretty":true, 
    "declaration":true,
    "sourceMap": true,
    "moduleResolution": "node",
    "rootDir": ".",
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "importHelpers": true,
    "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true,
    "noUnusedLocals": true,
    "allowSyntheticDefaultImports": true,
  },
  "exclude": [
    "node_modules",
    "build",
    "scripts",
    "acceptance-tests",
    "webpack",
    "jest",
    "src/setupTests.ts",
    "test",
    "jest.config.js",
    "dist",
    "example"
  ],
  "typeRoots": [
    "node_modules/@types"
  ]
}